CPV code 31000000 designates Electrical machinery, apparatus, equipment and consumables; lighting in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
31000000 is a top-level division — the broadest kind of CPV code. Divisions are usually too general for a contract notice: browse the 7 sub-codes below and pick the most specific code that still covers the whole contract.